So ... is the AAVSO's policy for what you would charge for this service up on the webpage somewhere,, or is this basically quotable at the time of order? (I can't imaging a demand for pay-for charts anymore, not profitable.)

I would certainly, these days, direct almost everyone to the "free" charts (and I do, of course encouraging them to either submit data, or better yet, to join and support the AAVSO and submit their data.)